Commencement Speech Should Be English Only?

After a graduation speech delivered in partial Vietnamese by Cindy Vo and Hieu Vo to express their respect for their parents, the school officials in Terrebonne Parish are calling for speeches to be address in English only. Cindy Vo said: “Co len minh khong bang ai, co suon khong ai bang minh.” I am not sure what she is saying. Is it misquoted? Could someone rewrite it with proper accents? In any rate, it is fucking absurd not to be able to say a line in foreign language during a speech.